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What are the advantages of star-delta starter with induction motor?

October 10, 2017 by Rohit

DWQA Questions › Category: Induction Motor & Generator › What are the advantages of star-delta starter with induction motor?
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Rohit asked 6 years ago
3 Answers
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Badshah answered 6 years ago

The main advantage of using the star delta starter is reduction of current during the starting of the motor.Starting current is reduced to 3-4 times Of current of Direct online starting. Hence the starting current is reduced , the voltage drops during the starting of motor in systems are reduced.

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reetu answered 6 years ago

1. The main advantage of using the star delta starter is 
reduction of current during the starting of the 
motor.Starting current is reduced to 3-4 times Of current 
of Direcr online starting.

2. Hence the starting current is reduced , the voltage 
drops during the starting of motor in systems are reduced.

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Fateh answered 6 years ago

At the time of starting an Induction motor tends to draw high-current (7to8 times higher than rated current ) . In small motors (<5hp) it’s okay. But for larger motor the starting current may be so high that it may damage the stator coil or even the power cables.
Star-Delta starter is used to reduce the starting current . Initially the motor windings are connected in star pattern. Then after a preset time the contactors make a delta pattern and the motor runs. While connected in star pattern, voltage across the stator coils is equal to the phase voltage (line voltage /1.3 aprox), so the value of starting current is reduced.

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